The Battle of Kolm-an was the last great battle of the Four Years War between the United Federation of Planets and the Klingon Empire. It was fought on reference stardate 1/9803.20 at the planet Kolm-an in Klingon space, and led to a final victory for the Federation. The Orions: Book of Common Knowledge depicts the Kolm-an base as an administrative base, while The Klingons mentions its importance to supply and repair. It is possible that the base's role expanded or changed during the war.